Fix: io timeout when snell v2 reuse connection (#1362)

component/snell/pool.go

@@ -3,6 +3,7 @@ package snell
 import (
 	"context"
 	"net"
+	"time"
 
 	"github.com/Dreamacro/clash/component/pool"
 
@@ -61,6 +62,9 @@ func (pc *PoolConn) Write(b []byte) (int, error) {
 }
 
 func (pc *PoolConn) Close() error {
+	// clash use SetReadDeadline to break bidirectional copy between client and server.
+	// reset it before reuse connection to avoid io timeout error.
+	pc.Snell.Conn.SetReadDeadline(time.Time{})
 	pc.pool.Put(pc.Snell)
 	return nil
 }